C8475-G2 – 8x1G SFP – 8×1/10G SFP+ – 4×10/25G SFP28 – 1RU Campus Edge Router
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C8475-G2 Description
The C8475-G2 is the higher-density member of the Cisco 8400 Series Secure Routers, a 1RU campus edge platform carrying twenty optical WAN ports: 8 x 1 GE SFP, 8 x 1/10 GE SFP+ and 4 x 10/25 GE SFP28. It forwards at up to 91 Gbps with 45 Gbps of IPsec, and its 21.7 Gbps of SD-WAN throughput is the highest figure Cisco publishes anywhere in the 8400 and 8500 lines. DRAM starts at 32 GB and reaches 64 GB from Cisco IOS XE 17.18.3, a capability the release gates rather than the hardware. The chassis is 16.25 in. deep at 15.5 lbs, takes 400W AC, DC or HVDC input, and carries NEBS GR-1089 and GR-63 criteria levels.
Quick Specs
|
Parameter |
Specification |
|---|---|
|
Product ID |
C8475-G2 |
|
Platform type |
1 RU fixed form factor |
|
WAN Ports |
8 x 1 GE (SFP), 8 x 1/10 GE (SFP+), 4 x 10/25 GE (SFP28) |
|
Expansion and cellular slots |
None on the 8400 Series |
|
Power Supply |
400W AC, 400W DC, or 400W HVDC |
|
Forwarding throughput |
Up to 91 Gbps at 512 bytes |
|
SD-WAN throughput |
Up to 21.7 Gbps at 512 bytes |
|
DRAM |
32 GB default, 64 GB from Cisco IOS XE 17.18.3 |
|
IPv4/IPv6 routes |
5.8M |
|
NEBS criteria levels |
GR-1089 and GR-63 |
|
Chassis weight |
15.5 lbs with two AC power supplies and the fan tray |
|
Minimum software release |
Cisco IOS XE 17.15.3 |
Product Performance
Key Features
Eight 1 GE SFP, eight 1/10 GE SFP+ and four 10/25 GE SFP28 ports fill a single rack unit, which lets one chassis terminate a campus edge that would otherwise need a second router or a modular platform with line cards.
At 21.7 Gbps of SD-WAN throughput this router leads every 8400 and 8500 model, including C8550-G2 at 19 Gbps despite that platform forwarding 24 Gbps faster; a design dominated by overlay traffic gets more from this SKU than from the larger series.
The 64 GB DRAM option is documented as supported from Cisco IOS XE 17.18.3, so the ceiling is set by the software train the estate runs rather than by the order; a site standardising on 17.15 gets 32 GB until it qualifies the newer release.
Double the SFP28 count of the smaller model gives a campus edge two redundant 25G pairs instead of one, which is what allows an active-active core handoff without borrowing an SFP+ port.
The supply steps to 400W AC alongside the 400W DC and HVDC options, so the higher port count does not change which facility types the router fits, only the wattage the site must provision.
The 5.8M IPv4 and IPv6 route capacity matches the smaller 8400 model rather than scaling with ports, so a full internet edge table is within reach on either, and the port count is a separate decision from routing scale.
Application Scenarios
Deployed where a campus edge terminates twelve or more optical circuits on one device, with 1 GE and 10 GE facing the distribution layer and 25 GE facing the core.
Installed as a regional hub whose traffic is predominantly SD-WAN overlay, where the 21.7 Gbps figure rather than raw forwarding sets the sizing.
Placed in sites that standardise one router part number across buildings on AC and plant rooms on DC or high-voltage DC power.
Product Comparison
|
Parameter |
C8475-G2 | ||
|---|---|---|---|
|
Series |
Cisco 8400 Series Secure Routers |
Cisco 8400 Series Secure Routers |
Cisco 8500 Series Secure Routers |
|
WAN Ports |
8 x 1 GE (SFP), 8 x 1/10 GE (SFP+), 4 x 10/25 GE (SFP28) |
8 x 1 GE (SFP), 2 x 1/10 GE (SFP+), 2 x 10/25 GE (SFP28) |
12x 1/10GE (SFP+) |
|
25 GE port count |
4 |
2 |
None on this platform |
|
Power Supply |
400W AC, 400W DC, 400W HVDC |
250W AC, 400W DC, 400W HVDC |
750 W AC, 950 W DC |
|
Forwarding throughput |
Up to 91 Gbps |
Up to 67 Gbps |
Up to 115 Gbps |
|
IPsec throughput |
Up to 45 Gbps |
Up to 31 Gbps |
Up to 48 Gbps |
|
SD-WAN throughput |
Up to 21.7 Gbps |
Up to 15.5 Gbps |
Up to 19 Gbps |
|
DRAM |
32 GB default, 64 GB from Cisco IOS XE 17.18.3 |
32 GB default |
32 GB default, 64 GB |
|
IPv4/IPv6 routes |
5.8M |
5.8M |
8M |
|
IPsec tunnels |
3,500 |
3,500 |
10,000 |
|
Chassis depth |
16.25 in. |
12 in. |
18.46 in. |
|
Chassis weight |
15.5 lbs |
12.5 lbs |
20.6 lbs |
|
Minimum software release |
Cisco IOS XE 17.15.3 |
Cisco IOS XE 17.15.3 |
Cisco IOS XE 17.15.4 |
- C8475-G2 buys port density from C8455-G2 and nothing else structural: four more SFP+ ports, two more SFP28 ports and 24 Gbps more forwarding, against the same 5.8M routes, the same 3,500 tunnels, the same NEBS levels and the same software floor. A site terminating under ten optical circuits is paying for cages it will not populate.
- The interesting comparison is against C8550-G2, and it does not run the way the model numbers suggest. C8550-G2 forwards 24 Gbps faster and holds 8M routes with 10,000 tunnels, but C8475-G2 delivers more SD-WAN throughput at 21.7 Gbps against 19 Gbps and offers 25 GE ports that C8550-G2 does not have at all.
- Tunnel scale is the one ceiling neither 8400 model can lift. Both stop at 3,500 while C8550-G2 reaches 10,000, so an SD-WAN hub terminating more spokes than that has to move series even though C8475-G2 would carry the throughput.
- For deciding which SKU to order, count 25 GE circuits and spoke tunnels first, because those two numbers separate all three: no 25 GE means C8550-G2 is viable, more than 3,500 tunnels means it is required, and anything in between comes down to whether two SFP28 ports or four are needed.
Selection Guide
1. When Four SFP28 Ports Earn The Extra Depth
Doubling to four 10/25 GE ports costs 4.25 in. of chassis depth and 3 lbs over C8455-G2 for identical routing scale; the step is worth it only when the design terminates two redundant 25G pairs rather than one, since neither model differs anywhere else in the data sheet.
2. Qualifying 17.18.3 Before Counting On Sixty-Four Gigabytes
Cisco documents the 64 GB DRAM option as supported from Cisco IOS XE 17.18.3 while the platform itself starts at 17.15.3; an estate that has not qualified the newer train should size the deployment against 32 GB, because the memory option cannot be used on the release the router ships against.
3. Overlay Throughput Against Forwarding Throughput
C8475-G2 leads C8550-G2 on SD-WAN at 21.7 Gbps against 19 Gbps while trailing it on forwarding at 91 Gbps against 115 Gbps; a hub whose traffic is mostly encrypted overlay should size on the SD-WAN column, where moving to the larger series would reduce capacity rather than add it.
4. The Tunnel Ceiling That Forces A Series Change
Both 8400 models cap at 3,500 IPsec tunnels; a hub aggregating more spokes than that has to take C8550-G2 and its 10,000 tunnels, giving up 25 GE ports in the process, so spoke count should be settled before port speed is discussed.
5. Provisioning Four Hundred Watts Rather Than Two Fifty
The AC supply steps from 250W on C8455-G2 to 400W here while the DC and HVDC options stay at 400W; a facility sizing circuits per rack unit should plan against the higher AC figure when standardising on this model across buildings.
Ordering Checklist
|
Check Item |
What to Confirm |
Why It Matters |
|---|---|---|
|
Power supply type |
Confirm whether the site feeds AC, DC or high-voltage DC, and order the 400W AC, 400W DC or 400W HVDC supply accordingly. |
The supply is selected at order time and cannot be changed by reconfiguration. |
|
Optics for twenty cages |
Confirm SFP, SFP+ and SFP28 optics are on the order for every port that will be used. |
All twenty WAN ports are optical cages and ship without transceivers. |
|
Release for the 64 GB option |
Confirm the estate runs Cisco IOS XE 17.18.3 or later before ordering the 64 GB DRAM configuration. |
Cisco documents that option as supported from that release, so an earlier train leaves the memory unusable. |
|
Software image floor |
Confirm the image is Cisco IOS XE 17.15.3 or later and the manager is Cisco Catalyst SD-WAN Manager 20.15.3 or later. |
Staging below the floor leaves the router unsupported after installation. |
|
Rack depth |
Confirm the rack clears 16.25 in. of chassis depth plus cabling. |
This chassis is 4.25 in. deeper than the smaller 8400 model and a shared rack plan can miss the difference. |
|
Site altitude |
Confirm the installation sits between -500 and 10,000 feet. |
The series is rated across that band and Cisco publishes no derating table outside it. |
Optional Add-ons
|
Add-on |
Description |
|---|---|
|
400W DC power supply |
DC input option in place of the 400W AC supply. |
|
400W HVDC power supply |
High-voltage DC input option for HVDC facilities. |
|
64 GB DRAM |
Memory option supported from Cisco IOS XE 17.18.3. |
|
600 GB storage |
Capacity option above the 64 GB default. |
|
2 TB storage |
Largest published storage option for the 8400 Series. |
Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Product ID | C8475-G2 | Series | Cisco 8400 Series Secure Routers |
| Platform type | 1 RU fixed form factor | WAN Ports | 8 x 1 GE (SFP), 8 x 1/10 GE (SFP+), 4 x 10/25 GE (SFP28) |
| Expansion slots | None on the 8400 Series | Cellular slot | None on the 8400 Series |
| Management Port | 1 x RJ45 out-of-band management | Console port | 1 x RJ45 and 1 x micro-USB |
| Storage interface | USB 3.0 Type-C | M.2 storage slot | Present |
| Asset tag | RFID | DRAM | 32 GB default; 64 GB supported from Cisco IOS XE 17.18.3 |
| Storage | 64 GB default, with 600 GB and 2 TB options | Power Supply | 400W AC, 400W DC, or 400W HVDC |
| Forwarding (512B) | Up to 91 Gbps | IPsec (512B) | Up to 45 Gbps |
| SD-WAN (512B) | Up to 21.7 Gbps | Security (EMIX) | Up to 10.9 Gbps |
| SD-WAN measurement basis | IPsec, QoS, Deep Packet Inspection and Flexible NetFlow enabled | IPv4/IPv6 routes | 5.8M |
| IPsec tunnels | 3,500 | Dimensions (H x W x D) | 1.73 in x 17.50 in x 16.25 in |
| Rack Units (RU) | 1 RU | Chassis weight | 15.5 lbs with two AC power supplies and the fan tray |
| Operating temperature | 32 to 104 degrees F | Storage temperature | -40 to 150 degrees F |
| Relative humidity | 10 to 85 percent operating; 5 to 95 percent storage | Altitude | -500 to 10,000 feet |
| NEBS criteria levels | GR-1089 and GR-63 | Minimum device OS | Cisco IOS XE 17.15.3 |
| Minimum SD-WAN Manager release | Cisco Catalyst SD-WAN Manager 20.15.3 | Series sibling on Meraki OS | 8455-G2-MX runs MX 19.2 under the Cisco Meraki dashboard |
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Questions & Answers
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How many 25G and 10G-capable WAN interfaces does C8475-G2 have?
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What software is required for the C8475-G2 64 GB DRAM option?
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Does C8475-G2 support more VPN tunnels than C8455-G2?
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Should I choose C8550-G2 over C8475-G2 just for higher SD-WAN throughput?
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Can C8475-G2 combine local security inspection with 25G WAN connectivity?
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Can the C8475-G2 fan tray be replaced without interrupting operation?
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Will C8475-G2 fit the same shallow space as C8455-G2?
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Can a C8455-G2 software license be moved to C8475-G2?
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